It’s an Android 7 (codenamed Android N, now Android Nougat) distribution with Raspberry Pi images (nowadays Raspberry Pi 3, but should run on older as well). Which means you do not have to upgrade your phone to use more recent versions of Android to program against.

At the recent Embedded Linux Conference and OpenIoT Summit, Mozilla Technical Evangelist Dietrich Ayala proposed a simple and affordable solution to home automation: A discarded smartphone can handle some of the most useful home automation tasks without requiring expensive hubs and sensors — or risking data security in the cloud.

I’ve been awaiting talks like this for years basically because I didn’t take the time to try myself.

These links will always return the adb/fastboot binaries currently shipping with Android Studio. No need to guess what the current version is, or update your own links: just follow these and get the latest binaries, direct from the source.